Sinker mechanism for knitting-machines.



G. W. CUMMINGS SINKER MECHANISM FOR KNITTING MACHINES.

APPLICATION man JAN. 9. 1917.

1,232,230. Patented; July 3, 1917.

2 SHEETF-SHEET I- G. W. CUMMINGS.

SINKER MECHANISM FOR KNITTING MACHINES. APPLICATION FILED JAN. 9, i917.

1,232,23. Patent/ed my 3, 1917.

2 SHEETS-SHEET 2.

Ja @fit for): a

In men 07 UNITED STATES PATENT ornron.

GEORGE w. CUMMINGS, or rnoY,

NEW YORK, ASSIGNOR TO ELECTRIC KNITTING: co.

Inc, or coHoEs, NEW YORK, A coaronnrion or NEW. YORK.

SINK-ER, MECHANISM Fen KNITTING-MACHINES.

Specification of Letters Patent.

Patented July 3, 191 '17.

Application filed Januar 9, 1917. Serial Nb. 141,470.

To cZZ whom itmay concern:

Be it known that I, Gnonen IV. CUM- MINGS, a citizen of the United States, residing at Troy, county of Rensselaer, and State of New York, have invented certain new and useful Improvements in Sinker Mechanism for- Knitting-Machines, of which the following is a specification.

Reference may be had to the accompanying drawings, and the reference characters marked thereon, which form a part of this specification. Similar characters refer to similar parts in the several figures therein.

This invention relates to an improvement upon United States Letters Patent No. 416,256, granted to me December 8, 1889,

for a plush bur for knitting machines.

or yarn, of sufficient prominence to give theproper plush surface to the fabric when brushed.

In the use of said prior bur, however, the sinker-fingers, whereby the loops of the backing thread were formed, were forced inwardly to form the loops by engagement of certain of the knitting needles with the respective sinker-fingers. This not only caused a strain upon the needles but limited the length of the loop which could be formed to the depth to which the needles entered between the blades of the yarnfeeding wheel.

In the manufacture of certain knitted fabrics for toweling, wash-cloths and the like, it is desirable to produce upon the surface of the knitted web, numerous loops of thread similar in appearance to, and accomplishing the same purpose as, the loops on woven fabric commonly known as Turkish toweling. Such loops have to be made of much more prominence than the loops which are to be brushed in making the plush surface, and I have found it difficult lieved of the strain of operating the sinkerfingers, and the inward loop-forming movement of the sinker-fingers is not limited to the dept-h to which the needlesenter between the blades of the thread-feeding wheel.

Figure 1 of the drawings is a View in side elevation of my improved sinker-mechanism applied to a spring-needle cylinder knitting-machine, the cylinder being shown in vertical section.

F ig. 2 is a top plan view of the sinkermechanism detached.

Fig. 3 is a similar view witht-he threadfeeding wheel detached.

Fig. 4; is a section taken on the broken line 44 in Fig. 3 in the plane of the aXis of the sinker-mechanism.

Referring to the drawings wherein the invention is shown in preferred form, 1 is a stationary support or bracket, mounted adjacent to the cylinder, 2, of a springneedle cylinder knitting-machine having the usual spi'ingneedles, 3.

A spindle, 4, projects upwardly from the inner end of the support or bracket, 1, forming a means for rotatively mounting the rotatory members of the sinker-mechanism in proper relation to the knitting-needles.

Upon the spindle, 4, is rotatively mounted a thread-or-yarn-feeding wheel, 5, an auxiliary-wheel, 6, and a gear-wheel, 7.

The thread-feeding wheel, 5, is provided with the usual notched blades, 8, forming spaces to engage the knittingmeedles, whereby said thread-feeding wheel is rotated by the knitting-needles in the cylinder, causing the yarn or thread to be continuously fed to the needles.

The gear-wheel, 7, has peripherally disposed teeth adapted to mesh with the knitting-needles; and the auxiliary-wheel, 6, is clamped by means of a nut, 9, in fixed relation to said gear-wheel, 7, to rotate therewith.

The auXiliary-wheel, 6, has mounted thereupon sinker-fingers, 10, ca able of oscillatory movement substantial y as shown and ing blades looped by described in said prior patent, said sinkerfingers being adapted to play in certain of the needle-engaging spaces in the threadfeeding wheel, 5. i

These sinker-fingers are adapted to be forced outward at certain times by means of an internal cam 11, nonrotatively mounted upon the spindle, 4, between the thread-feeding wheel, 5, and the auxiliary-wheel, 6, in

position to engage the inner side of they sinker-fingers. As a means for causing the inward loop-forming movement of the sinker-fingers, I provide an external cam, 12, fixedly mounted upon the bracket 1, in position to engage the outer side of the sinkerfingers to force them into the respective spaces in the thread-feeding wheel just in advance of the respective needles, causing each sinker-finger to engage the thread or yarn and force a loop of the same into a needle engaged space between two neighborin the thread-feeding wheel.

lVhere the thread is not thus engaged and the sinker-fingers it is laid along the inner side or back of the needles in the usual manner to incorporate the backingthread or yarn into the body of the knitted web.

The engagement of the knitting-needles with the thread-feeding wheel, 5, and with the gear-wheel, 7 which is in fixed relation to the auxiliary-wheel, 6, causes all three flcpies of this patent may be obtained for having in combination a spindle; a thread- I feeding wheel rotatively mounted upon said spindle and provided wlth spaces for engagement wlth the knlttlng-needlos; an auxiliary-wheel rotatively mounted upon said spindle; oscillatory sinker-fingers mounted upon said auxiliary-wheel in play in certain of the needle-engaging spaces in said thread-feeding wheel; an internal cam nonrotatively mounted upon said spindle between said thread-feeding wheel and said auxiliary-wheel engageable with the inner sides of said sinker-fingers; and an external cam engageable with the outer sides of said sinker-fingers.

In testimony whereof, I have hereunto set my hand this 20th day of December, 1916.

GEORGE WV. CUMMINGS. 1

five cents each, by addressing the Commissioner of Patents,

Washington, D. 0.

position to, 

